Centrifugal casting



Patented New. 211, R922.

UNETEED) stares @FFEQEO LEON CAMMEN, F TUCKAHOE, NEW YORK.

CENTEIFUGAL CASTING.

No Drawing.

useful Improvements in Centrifugal Cast-x ings, of which tion.

The present is a companion application to the application by the sameinventor entitled Casting tubular goods, filed July 18, 1921, Ser. No.485,698, Div. 3, Room 175, in which all claims have been foundallowable. Like the former application, it refers to the casting bycentrifugal means of goods from metals which chill very rapidly, such asMonel metal and various steels.

All attempts to cast them into shapes of comparatively thin sectionshave failed because the metal chilled too rapidly, often before it hadtime to form into a pipe. The present invention provides a processwherein the mold is heated to a hi h temperature, close to the meltingpoint of the inetal to be the following is a specificapoured. This hotmold. is then placed into;

a metal frame or sheath, to give it the neces sary mechanical supportand is, with its frame or sheath, subjected to centrifugal spinning,whereupon the metal is poured Application filed February 24, 1922 SerialNo. 539,031.

into the mold. The molten metal coming in contact with the very hot molddoes not lose its heat with the same Speed as when. it hits a cold mold,and enough time becomes available-to form a good tube.

The temperature to which the mold has to be heated should be close tothe: melting point of the metal which means in practice from 300 to 800deg. Fahr. below it, depending on conditions in each case. The properselection of the temperature in each case is a matter which a goodfoundryman with an understanding of the present process can easilyhandle.

I claim: A process of centrifugal casting comprising the followingsteps: heating the mold to a temperature close to the melting po1nt ofthe metal to be poured, inserting the mold into a metal sheath to giveit mechanical strength, subjecting the whole to centrifugal spinning,and pouring molten metal into the mold.

Signed in New York, in the county and State of New York, February 23,1922.

' LEON oEN.

' Witness:

. ERNEsr HARTFORD.

